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/* $XFree86: xc/programs/Xserver/hw/xfree86/xf4bpp/ppcImg.c,v 1.5 2003/02/18 21:29:59 tsi Exp $ */
/*
* Copyright IBM Corporation 1987,1988,1989
*
* All Rights Reserved
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose and without fee is hereby granted,
* provided that the above copyright notice appear in all copies and that
* both that copyright notice and this permission notice appear in
* supporting documentation, and that the name of IBM not be
* used in advertising or publicity pertaining to distribution of the
* software without specific, written prior permission.
*
* IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
* IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
* ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
* WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*
*/
/* $XConsortium: ppcImg.c /main/4 1996/02/21 17:57:53 kaleb $ */
#include "xf4bpp.h"
#include "OScompiler.h"
#include "mi.h"
#include "scrnintstr.h"
#include "servermd.h"
/* Was MIGETIMAGE -- public entry for the GetImage Request
* We're getting the image into a memory buffer. While we have to use GetSpans
* to read a line from the device ( since we don't know what that looks like ) ,
* we can just write into the destination buffer
*
* two different strategies are used, depending on whether we're getting the
* image in Z format or XY format
* Z format:
* Line at a time, GetSpans a line and bcopy it to the destination
* buffer, except that if the planemask is not all ones, we create a
* temporary pixmap and do a SetSpans into it ( to get bits turned off )
* and then another GetSpans to get stuff back ( because pixmaps are
* opaque, and we are passed in the memory to write into ) . This is
* completely ugly and slow but works, but the interfaces just aren't
* designed for this case. Life is hard.
* XY format:
* get the single plane specified in planemask
*/
void
xf4bppGetImage( pDraw, sx, sy, w, h, format, planeMask, pdstLine )
DrawablePtr pDraw ;
int sx, sy, w, h ;
unsigned int format ;
unsigned long planeMask ;
char * pdstLine ;
{
#if 1
int depth, i, linelength, width ;
DDXPointRec pt ;
char *pbits ;
XID gcv[2] ;
PixmapPtr pPixmap = (PixmapPtr) NULL ;
GCPtr pGC ;
char *pDst = pdstLine ;
depth = pDraw->depth ;
if ( format == ZPixmap ) {
linelength = PixmapBytePad( w, depth ) ;
/* if ( pDraw->type == DRAWABLE_WINDOW ) { */
sx += pDraw->x ;
sy += pDraw->y ;
/* } */
if ( ( ( ( 1 << pDraw->depth ) - 1 ) & planeMask )
!= (unsigned)( 1 << pDraw->depth ) - 1 ) {
pGC = GetScratchGC( depth, pDraw->pScreen ) ;
pPixmap = (PixmapPtr)
(* pDraw->pScreen->CreatePixmap)( pDraw->pScreen, w, h, depth ) ;
gcv[0] = GXcopy ;
gcv[1] = planeMask ;
DoChangeGC( pGC, GCPlaneMask | GCFunction, gcv, 0 ) ;
ValidateGC( (DrawablePtr)pPixmap, pGC ) ;
pbits = (char *)ALLOCATE_LOCAL(w);
for ( i = 0 ; i < h ; i++ ) {
pt.x = sx ;
pt.y = sy + i ;
width = w ;
(* pDraw->pScreen->GetSpans)( pDraw, w, &pt, &width, 1, pbits ) ;
pt.x = 0 ;
pt.y = i ;
width = w ;
if ( planeMask & ((1 << depth) - 1) ) /* GJA -- mfb bug */
(* pGC->ops->SetSpans)( (DrawablePtr)pPixmap, pGC, pbits, &pt, &width, 1, TRUE ) ;
(* pDraw->pScreen->GetSpans)( (DrawablePtr)pPixmap, w, &pt, &width, 1, pDst ) ;
pDst += linelength ;
}
DEALLOCATE_LOCAL(pbits) ;
(* pGC->pScreen->DestroyPixmap)( pPixmap ) ;
FreeScratchGC( pGC ) ;
return ;
}
for ( i = 0 ; i < h ; i++ ) {
pt.x = sx ;
pt.y = sy + i ;
width = w ;
(* pDraw->pScreen->GetSpans)( pDraw, w, &pt, &width, 1, pDst ) ;
pDst += linelength ;
}
}
else
#endif
miGetImage( pDraw, sx, sy, w, h, format, planeMask, pdstLine ) ;
}
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